import java.security.MessageDigest;

public class CreateMD5 {

    //静态方法，便于作为工具类  
    public static String getMd5(String plainText)throws Exception {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(plainText.getBytes());
            byte b[] = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            //32位加密  
            return buf.toString();
            // 16位的加密
            //return buf.toString().substring(8, 24);  
    }
    public static void main(String[] args) throws Exception {
        //测试
        System.out.println(CreateMD5.getMd5("abcde"));
    }
}